| Ons Coding System |
Article Index for Ons |
Shopping Coding |
Website Links For Ons |
Information AboutOns Coding System |
| CATEGORIES ABOUT ONS CODING SYSTEM | |
| geocodes | |
| united kingdom census 2001 | |
| SHOPPER'S DELIGHT | |
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AUTHORITIES, WARDS, AND CENSUS AREAS The code is constructed top down from a 4 character code representing a Unitary Authority or Administrative County & District , eg: Local Government Wards have a two-letter code within their local authority, and Census Output Areas an additional 4 digits within a ward. Census Output Areas are the smallest unit for which census data is published - they contain at least 40 households (preferably 100), and are built up from Postcode blocks ''after'' the census data is available, with a view to being socially as homogeneous as possible. A new set of Output Areas will be created for each Decennial Census . Census 2001 was the first to use this system - previously census data was published for larger '''Enumeration Districts''' which were delineated ''before'' the census was conducted. Enumeration Districts are still used for the collection of data but not for publication. The authority and ward codes are recognised by Eurostat as Local Administrative Unit code levels 1 & 2 within the NUTS system. CIVIL PARISHES An overlapping system encodes Civil Parish areas. Parishes are represented by an additional 3 digits within their local authority: ONS CODES FOR COUNTIES & DISTRICTS Also showing NUTS(3) codes thus: (UKH12)Single-tier districts
Two-tier counties & districts
Northern Ireland districts
Non-hierarchical codes for summary data in metropolitan areas
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